diff --git a/internal/trie/proof/generate.go b/internal/trie/proof/generate.go
index 1299a31fd41..360db9f5643 100644
--- a/internal/trie/proof/generate.go
+++ b/internal/trie/proof/generate.go
@@ -28,10 +28,10 @@ type Database interface {
 // corresponding to the root hash given, and for the (Little Endian)
 // full key given. The database given is used to load the trie
 // using the root hash given.
-func Generate(rootHash common.Hash, fullKey []byte, database Database) (
+func Generate(rootHash []byte, fullKey []byte, database Database) (
 	encodedProofNodes [][]byte, err error) {
 	trie := trie.NewEmptyTrie()
-	if err := trie.Load(database, rootHash); err != nil {
+	if err := trie.Load(database, common.BytesToHash(rootHash)); err != nil {
 		return nil, fmt.Errorf("cannot load trie: %w", err)
 	}
 
diff --git a/internal/trie/proof/generate_test.go b/internal/trie/proof/generate_test.go
index 9c16e199f51..c744ab10dee 100644
--- a/internal/trie/proof/generate_test.go
+++ b/internal/trie/proof/generate_test.go
@@ -19,7 +19,7 @@ func Test_Generate(t *testing.T) {
 	errTest := errors.New("test error")
 
 	testCases := map[string]struct {
-		rootHash          common.Hash
+		rootHash          []byte
 		fullKey           []byte // nibbles
 		databaseBuilder   func(ctrl *gomock.Controller) Database
 		encodedProofNodes [][]byte
@@ -27,7 +27,7 @@ func Test_Generate(t *testing.T) {
 		errMessage        string
 	}{
 		"failed loading trie": {
-			rootHash: common.Hash{1},
+			rootHash: []byte{1},
 			databaseBuilder: func(ctrl *gomock.Controller) Database {
 				mockDatabase := NewMockDatabase(ctrl)
 				mockDatabase.EXPECT().Get(common.Hash{1}.ToBytes()).
@@ -41,7 +41,7 @@ func Test_Generate(t *testing.T) {
 				"test error",
 		},
 		"walk error": {
-			rootHash: common.Hash{1},
+			rootHash: []byte{1},
 			databaseBuilder: func(ctrl *gomock.Controller) Database {
 				mockDatabase := NewMockDatabase(ctrl)
 				encodedRoot := encodeNode(t, node.Node{
@@ -57,7 +57,7 @@ func Test_Generate(t *testing.T) {
 			errMessage: "cannot find node at key 0x01 in trie: key not found",
 		},
 		"leaf root": {
-			rootHash: common.Hash{1},
+			rootHash: []byte{1},
 			databaseBuilder: func(ctrl *gomock.Controller) Database {
 				mockDatabase := NewMockDatabase(ctrl)
 				encodedRoot := encodeNode(t, node.Node{
@@ -76,7 +76,7 @@ func Test_Generate(t *testing.T) {
 			},
 		},
 		"branch root": {
-			rootHash: common.Hash{1},
+			rootHash: []byte{1},
 			databaseBuilder: func(ctrl *gomock.Controller) Database {
 				mockDatabase := NewMockDatabase(ctrl)
 				encodedRoot := encodeNode(t, node.Node{
diff --git a/internal/trie/proof/proof_test.go b/internal/trie/proof/proof_test.go
index fa3554b338a..6e7810047a3 100644
--- a/internal/trie/proof/proof_test.go
+++ b/internal/trie/proof/proof_test.go
@@ -41,7 +41,7 @@ func Test_Generate_Verify(t *testing.T) {
 	require.NoError(t, err)
 
 	for i, key := range keys {
-		proof, err := Generate(rootHash, []byte(key), database)
+		proof, err := Generate(rootHash.ToBytes(), []byte(key), database)
 		require.NoError(t, err)
 
 		expectedValue := fmt.Sprintf("%x-%d", key, i)
diff --git a/lib/runtime/wasmer/imports_test.go b/lib/runtime/wasmer/imports_test.go
index ec57ce3d292..516f50dbde6 100644
--- a/lib/runtime/wasmer/imports_test.go
+++ b/lib/runtime/wasmer/imports_test.go
@@ -1794,7 +1794,7 @@ func Test_ext_trie_blake2_256_verify_proof_version_1(t *testing.T) {
 
 	var allProofs [][]byte
 	for _, key := range keys {
-		singleProof, err := proof.Generate(hash, key, memdb)
+		singleProof, err := proof.Generate(root, key, memdb)
 		require.NoError(t, err)
 		allProofs = append(allProofs, singleProof...)
 	}
diff --git a/lib/trie/database_test.go b/lib/trie/database_test.go
index 1e08b32cadd..6ad78ca7a4b 100644
--- a/lib/trie/database_test.go
+++ b/lib/trie/database_test.go
@@ -131,7 +131,7 @@ func Test_Trie_WriteDirty_Delete(t *testing.T) {
 func Test_Trie_WriteDirty_ClearPrefix(t *testing.T) {
 	t.Parallel()
 
-	const size = 2000
+	const size = 15000
 	trie, keyValues := makeSeededTrie(t, size)
 
 	generator := newGenerator()